Liquid delivery or supply apparatus



A ril 23, 1957 A. T. JUNIPER 2,789,724

= LIQUID DELIVERY OR SUPPLY APPARATUS Filed Jan. 19, 1955 w 2 Sheets-Sheet 1 FIG].

I 38 46 45 44 4s 46 47 I2 ALB/[RT THOMAS ITU/WPER M WM Alforneys April 23, 1957 A T, JUNIPER 2,789,724

' LIQUID DELIVERY OR SUPPLY APPARATUS Filed Jan'. 19, 1955 A 2 Sheets-Sheet 2 FICA: 32 14 32 32 [0 FIGS.

a a 36 3g 36 4 I 43 Inventor ALBERT THOIQIAS JUN/PER Attorney! This invention relates to the delivery or supply of liquid (for example oil) under pressure, more particularly to United States Patent O 2,789,724 Patented Apr. 23, 1957 'ice : a 'tube 22 also passing through plate 18; a gasket (not shown) is fitted between block 12 and plate 18 to prowvide anair-tight seal, and tubes 17 and 22, are, respec- -:tive1y, provided with flanges 1? and 22 between which iJandthe under surface of plate 18 are disposed washers 23, 24. A washer 25 is fitted on screw 19.

1 Spacedly connected to plate 18 by means of tre-rods 26 with draw-up nuts 26 is a circular plate 27, and *tbetween said plates is clamped a transparent or partially transparent graduated cylindrical container or jar 28 whichhas its lower closed end 23* located in a correspondreceptacles"-such,'for ins'tance,-as oil tanks of aircraft-- s which; ornthe inlet orifices whereof, are "dilficult of access for filling :and replenishment or hopping-up,- as and :when'required; and the invention has for itsbbject to provide apparatus, including a delivery unit ior gun,"

adapted for the supplying to a tank of predetermined quantities of liquids; said unit or gun including a graduated container whereinto liquid from said tank can be filled, and wherefrom liquid may be dispensed, via a nozzle of said unit or gun, by means of compressed air admitted to said container. The unit or gun includes a two-way valve for selectively connecting same with the liquid of said tank and with the compressed air thereof, and also a valve for admitting said liquid or compressed air, according to the position of said two-way valve, to the graduated container. Said second-mentioned valve is spring-urged to closed position and is hand-operable by means of a trigger-lever.

In use, said two-way valve is connected by flexible twin piping to the tank, which may be of any suitable type, containing under air pressure the liquid to be dispensed, one of the flexible pipes being in communication with the compressed air of the tank and the other pipe with the liquid. Thus, on appropriate positioning of the two-way valve, and opening of the trigger-valve, oil will be fed into the graduated container to required level by the air pressure in the tank, and, on reversing said valve, compressed air from the tank may be introduced to said container to discharge its contents, or a portion of same, via the nozzle of the gun.

I will further describe my invention by the aid of the accompanying explanatory drawings, which illustrate, by way of example only, and not of limitation, one mode of embodiment.

In said drawings:

Fig. 1 is a side elevation of a liquid delivery gun under the invention.

Fig. 2 is a section taken as on line II-II, Fig. 3.

Fig. 3 is a plan view, and

Fig. 4 is a fragmentary view, drawn to an enlarged scale as compared with the preceding views, showing part of Fig. 2.

Referring now to said drawings, 10 denotes a cylindrical barrrel one end whereof is internally screw-threaded, as at 11, and fitted to a block 12 having an externally screwthreaded part 13 which is provided with a valve opening 14 (Fig. 4) the latter communicating with a longitudinal passageway 15.

An aperture 16 drilled laterally from the underside of block 12 opens into passage 15 and is screw-threaded to receive a tube 17 which passes through an aperture provided in a circular plate 18 mounted on the underside of block 12 by means of a screw 19. Block 12 is also formed with a longitudinal passage 20 communicating with a lateral passage 21 which is screw-threaded to receive ingly shaped recess 27 of plate 27, and its upper rim 28 seated in air-tight manner against a ring 29 of rubber, or othersuitable resilient substance, inset into the underside of plate .18. Tubes 17"and 22 thus open within and are enclosed by container 28. A vent valve 30 with a tap 30 is mounted on plate 18 in order that the container 23 may:be opened to the atmosphere as andwhen required.

nrDisposed within barrel 10is a longitudinally displacet'able rod 31 having mounted on its forwardend a valve wclosurefilrof circular cross section, which is a sliding fit Within valve-opening 14 of block 12 and is provided with a series of longitudinally disposed channels or flutings 32 Rearwardly of flutings 32 of valve closure 32 is formed a flange 32 with a washer 32 which is adapted to form an oil-tight and air-tight seal when seated against the rim 14*- of valve opening 14. The end of rod 31 remote from valve 32 is screw-threaded as at 31, and projects from barrel 10 through a gland 33 located between an internal flange 10 of barrel 1i and a gland nut 34. Disposed around rod 31, being confined between said flange 10 and a flange 31 of rod 31, is a helical compression-spring 35 which continuously urges valve 32 to closed position, as shown in Fig. 2.

The end 31 of rod 31 is threaded through an aperture of a stirrup 36 and fitted with stop nut 37, the free ends of said stirrup being pivotally connected by nuts and bolts 36 to the arms 38 of a bifurcated trigger-lever 38 which,

in turn, is pivoted by screws 39 to a bridge piece 40 pro vided on barrel It). It will thus be seen that if pressure is applied to trigger-lever 38 in the direction of the arrow I (Fig. 1), rod 31 will be moved rearwardly against the influence of spring 35 by stirrup 36, and the flange of valve 32 will become unseated from the rim 14 of valve opening 14, as shown in Fig. 4.

Communicating with the bore of barrel 10 is a rigid pipe 42 which is secured in position by way of a block 41' stop position branch 43 is closed and branch 43* is con nected with pipe 42.

The discharge nozzle of the gun may be of any type appropriate to the purpose for which it is to be used, and as shown in the drawings, a length of flexible hose 44, having nozzle-ends 45 with union nuts 46, is mounted on the forward end of block 12 which is turned to circular cross-section and screw-threaded as at 47 to receive same.

In using the gun, one of the branch pipes of valve 43, for example branch 43*, is connected by flexible piping to a supply of liquid contained in a tank (not shown) under air pressure, and the other branch 43 is similarly connected with a source of compressed air, conveniently that of the liquid supply tank. The transparent manipulating valve 43 to connect branch 43 to pipe 42,

(b) opening vent valve 30 to atmosphere, and (c) pressing trigger-lever 38, when liquid will be forced through pipe 42 into the bore of barrel 10 through the valve opening 14, via the fiutings 32 of valve 32, and thence, by way of passages 15, 16 and tube 17, to container 28. The

lever 38 is now operated, container 28 will become pressurised and, its contents discharge via tube 22, lateral passage 21, passage 29, and so through flexible hose 44.

For comfort of handling,a suitably shaped handle component 48 is fitted over tube 42 and secured in position against blocks 43 by means of a clamp nut 49.

What I claim as my invention and desire to secure by Letters Patent is:

1. Apparatus for the delivery of measured quantities of liquid, comprising a graduated container, a first tube, a second tube and said first tube extending into said graduated container, a cylindrical barrel attached to said container, a two'way valve connected to said barrel and the bore thereof for selectively connecting the bore of said barrel with a liquid under pressure from a supply tank for a supply of compressed air, a normally closed triggeroperable valve controlling the flow between the bore of said barrel and said first tube whereby liquid or compressed air according to the position of the two-way valve can be supplied to said container, and a nozzle having said second tube connected thereto whereby liquid from said container may be discharged by means of compressed air admitted to said container via said first tube. 2. Apparatus for the delivery of measured quantities of liquid according to claim 1, wherein a ventvalve is provided for at times opening said container to the atmosphere, a handle is connected to said barrel and said two-way valve is positioned at said handle.

References Cited in the file of this patent UNITED STATES PATENTS 

